TWI804546B - Blood collection tube holder with single needle - Google Patents

Abstract

A blood collection tube holder having a retractable single needle and a body comprising substantially parallel and laterally spaced apart barrel and needle retraction cavities separated by a partial wall that facilitates lateral movement of the single needle from the barrel cavity into alignment with the needle retraction cavity to initiate needle retraction. The barrel and a frontal attachment to the barrel are cooperatively configured to facilitate relative sliding movement between in a direction that is transverse to the longitudinal axis through the retractable single needle to initiate needle retraction.

Description

Blood Collection Tube Holder with Single Needle

The present invention is a medical device that can be used to draw blood from humans or animals. The subject device is often referred to as a "blood collection tube holder" or "blood tube holder" because it is constructed for use with commercially available conventional "blood collection tubes" ) or the "blood tube" combination, which is manufactured and sold by several different companies. The present invention also relates to single-use blood collection hubs having a single needle that can be withdrawn into a confined space within the device after use to protect patients and health care workers from accidental needle sticking, thereby reducing accidental sticking. The possibility of pathogenic contamination associated with stickiness. One aspect of the present invention pertains to a blood collection hub having a body including substantially parallel and laterally spaced syringe barrels and a needle withdrawal lumen separated by a portion of wall that facilitates withdrawal of a single retractable needle from the barrel lumen. Move laterally into alignment with the needle withdrawal lumen to initiate needle withdrawal. Another aspect of the invention pertains to a blood collection hub having a barrel and a front attachment cooperatingly configured for relative sliding therebetween in a direction transverse to the longitudinal axis passing through the needle.

For example, conventional blood collection hubs are disclosed in US Patent Nos. 5,810,775, RE39,107, 8,496,600, 9,247,899 and US Patent Publication Nos. 20160310057, 20180008180, 2018/0008181.

Some of these devices have two separate needles, including a forward-pointing venipuncture needle and a rearward-pointing discharge needle. When the tube is inserted into the open rear end of the barrel, the discharge needle penetrates a stopper arranged in front of the blood collection tube. After the fluid sample is collected, the blood collection tube is removed from the barrel of the blood hub, and the polymeric sheath expands to cover the rearward facing needle tip to prevent leakage of bodily fluids from the open rear end of the barrel. In one such device, a hinged cover is provided on the rear of the barrel, and closing the cover after removal of the blood collection tube triggers both the discharge needle and the venipuncture needle to withdraw back into the barrel, thereby making the device " Safe" (safe) and is not reusable.

More recently, blood collection hubs have been disclosed that include a long, rearwardly biased single needle with two front and rear facing tips. After the fluid sample is collected and the blood collection tube is removed, needle retraction is activated by depressing an actuator containing a needle withdrawal chamber that moves to a position that is sufficiently aligned with the needle so that both ends of the needle are deflected rearward Press into the needle withdrawal cavity of the device, thereby rendering the device "safe" and non-reusable.

More recently, blood collection hubs have been disclosed including Split venipuncture needle and discharge needle, and including a withdrawal chamber for the venipuncture needle, which is arranged beside and parallel to the syringe, as a separate chamber integrally formed with the syringe or as a separate chamber before the syringe is attached part of the file. The venipuncture needle is biased rearwardly and withdrawal of the venipuncture needle is initiated by lateral sliding of at least a portion of the front attachment of the barrel. During such movement, the forwardly protruding venipuncture needle moves laterally from alignment with the rearwardly facing discharge needle to generally coaxial alignment with the needle withdrawal lumen. Once the venipuncture needle is approximately aligned with the needle withdrawal lumen, the rearwardly directed bias force retracts the venipuncture needle to a "safe" position within the device while the discharge needle maintains its original position deployed in its barrel. Before or after the needle is withdrawn, the blood collection tube can be removed from the barrel and the elastomeric sheath expanded over the rearward facing tip behind the discharge needle to prevent leakage of bodily fluids from the open rear end of the barrel.

Notwithstanding the improvements and advantages achieved through use of the previously disclosed devices, there is a need for a blood collection hub comprising a single needle that can be withdrawn after use by lateral sliding of the front attachment relative to the barrel to The entire needle is repositioned into approximately coaxial alignment with the full length needle withdrawal lumen integrally formed with the barrel.

Disclosed is a blood collection hub comprising: a generally cylindrical body; a front attachment; and a single retractable needle comprising oppositely directed venipuncture ends or tips and fluid discharge ends or tips. The body and the front attachment are constructed in conjunction to facilitate the body facing each other before the needle is withdrawn. Make a lateral glide on a single needle. In a satisfactory aspect of the invention, the body further includes a generally parallel cylindrical lumen separated by a partial wall and an integrally formed needle withdrawal lumen. The partial wall is desirably configured to facilitate lateral sliding of the fluid discharge end of the single needle from a first position wherein the single needle is generally centered within and coaxially aligned with the barrel cavity to a second position Is a single needle approximately aligned with the needle withdrawal lumen. The barrel lumen is configured to receive and support a conventional blood collection tube cooperatingly engaged with the fluid discharge end of the single needle.

The venipuncture end of the single needle projects forwardly from the front attachment and is desirably covered by a selectively releasable needle cover prior to use. The front attachment further includes: a hub connector that frictionally engages and partially covers the open front end of the barrel; and a slider that slidably engages the tube along an axis generally transverse to the longitudinal axis passing through the single needle. socket connector. The slider is configured to position and support a rearwardly biased hub attached in fixed relation to a single needle. The hub connector further includes a transverse slot that facilitates relative lateral movement of the single needle between the first and second positions when oppositely directed manual pressure is applied to the body and slide for the purpose of approximately aligning the hub and the slider. needle withdrawal lumen to initiate a single needle withdrawal into the needle withdrawal lumen. In a preferred embodiment of the invention, the selectively releasable needle cover further includes a locking arm which prevents the slider and the needle withdrawal cavity from becoming substantially aligned and thereby prevents the withdrawal of a single needle from being initiated prior to use.

10: Blood collection tube holder

12: Ontology

14: Cavity

16: Syringe

20: The needle is withdrawn into the chamber

22: rear flange

24: Tube socket connector

26: Elastomer sheath

28: Needle seat

30: Needle

32: Venipuncture end

34: Fluid discharge port

36: coil spring

38: Slider

40: needle cover

42:Lock support arm

44: front surface

46: needle support

48: Touch surfaces, touch pads

50: top rail

52: Bottom rail

54: Positioning block

56: Positioning block

60: caliber

62: round wall

64: bow ring

68:Top rail

70: Bottom rail

72: slot

74: touch surface, touch pad

76: Needle withdrawal cavity

80: Reduce the height of the part

82: part wall

84: flat edge

86: flat edge

88: arched edge

90: arched edge

92: Needle seat

94: ring protrusion

96: outstanding

98: outstanding

100: sunken

102: sunken

Further describe and explain the present invention with respect to the following drawings Equipment, wherein: Fig. 1 is a front perspective view of a specific aspect of the blood collection tube base of the present invention; Fig. 2 is a front perspective view of the blood collection tube base of Fig. 1 with the needle cover removed; Fig. Figure 4 is a top plan view of the blood collection tube base generally shown in Figures 1 and 3, with the exception that the markings are also shown in Figure 4 in dashed outline; Figure 5 is the same as in Figure 1 Figure 6 is a rear view of the blood collection tube base of Figure 5; Figure 7 is a top view of the blood collection tube base of Figure 4 Plan view, with the needle cover removed; Figure 8 is a right side view of the blood collection hub of Figures 1 and 3; Figure 9 is a left side view of the blood collection hub of Figure 1, but clockwise about its longitudinal axis Rotate 180 degrees; Figure 10 is a cross-sectional view along the line A-A of Figure 5; Figure 11 is an exploded perspective view of the blood collection tube base of Figure 1; Figure 12 is the blood collection tube base of Figure 7, and the venipuncture needle is withdrawn; Fig. 13 is the blood collection socket of Fig. 5 with the needle cover removed and the venipuncture needle withdrawn; Fig. 14 is a sectional view along line C-C of Fig. 13; Fig. 15 is the blood collection socket of Fig. 2 , and the needle is withdrawn; Figure 16 is an enlarged detail view of the needle support of Figure 11; Figure 17 is a rear perspective view of the needle support of Figure 16 rotated 180 degrees clockwise about a longitudinal axis passing through the present blood collection hub; 18 is an enlarged detail view of the hub connector of FIG. 11; FIG. 19 is a rear perspective view of the hub connector of FIG. 18 rotated 180 degrees clockwise about a longitudinal axis passing through the present blood collection hub Degree; and Figure 20 is an enlarged cross-sectional view along the line B-B of Figure 4.

1-11, blood collection hub 10 includes body 12, front attachment (which further includes hub connector 24 and slide 38), needle cover 40 (FIGS. 1 and 3), single retractable needle 30 (figure 2). The body 12 further includes a barrel 16 , a barrel cavity 14 , a needle withdrawal chamber 20 , and a rear flange 22 disposed around the rear opening of the barrel 16 . Referring to Figures 2 and 7, the single retractable needle 30 protrudes forwardly from the needle support 46 of the slide 38 of the front attachment.

Referring to FIGS. 4-6 and 8-10, the blood collection hub 10 is shown in its pre-use position with the selectively removable needle cover 40 mounted over the retractable single needle 30 and frictionally engaging the axial Extending circumferentially spaced ribs (which are disposed about the needle support 46, visible in FIG. 7). A locking support arm 42 (visible in FIGS. 10, 11 ) is provided to avoid relative slippage between the body 12 and the slider 38 prior to use of the single retractable needle 30 to draw blood from the patient. Slider 38 further includes a front surface 44 from which needle support 46 protrudes forwardly around a portion of retractable single needle 30 as best seen in FIG. 7 .

Referring to FIGS. 10-11 , the single retractable needle 30 further includes a forward-facing venipuncture end 32 and a rearward-facing fluid discharge end 34 . Before a blood collection tube (not shown) is inserted into the barrel lumen 14 and the blood collection hub 10 is used to collect blood from the patient, the selectively releasable needle cover 40 is put in place, as discussed above, and the retractable elastic Body sheath 26 covers fluid discharge end 34 of single retractable needle 30 to protect fluid discharge end 34 from inadvertent contamination. When the blood collection tube is inserted into the barrel lumen 14 of the barrel 16 of the body 12, the sheath 26 retracts back around the single retractable needle 30, allowing the fluid discharge end 34 to penetrate the elastomeric stopper in the blood collection tube , to establish fluid communication between the venipuncture end 32 of the single retractable needle 30 and the interior of the blood collection tube that discharges the drawn blood. When the single retractable needle 30 is in its pre-use position, as shown in FIG. separated.

Referring again to FIGS. 10-11 , the single retractable needle 30 is desirably attached in a fixed axial relationship to the hub 28, 92, which further includes a rearwardly extending annular projection 94 configured for Frictionally engages the forwardly extending end of a retractable elastomeric sheath 26, which is preferably a rubber sleeve. A biasing member, such as a compressible coil spring 36, is desirably positioned within the bore 60 of the needle support 46 (FIG. 16), around the forwardly facing shaft portion of the centrally disposed portion of the needle 30 and hub 28, and When compressed during assembly of blood collection hub 10 , it abuts and engages the front side of head 92 of hub 28 . Because as long as the retractable single needle 30 is maintained in its forwardly protruding position, the head 92 of the needle hub 28 is positioned relative to the front attachment of the blood collection hub 10. and body 12 while being rearwardly biased.

Referring to FIGS. 11, 16, 17, 20, the slider 38 (FIG. 7) of the front attachment of the body 12 further includes opposing positioning blocks 54, 56 engageable with a cooperatingly configured head 92 of the hub 28 ( FIG. 11 ) to move needle hub 28 laterally, as discussed below. The laterally extending top and bottom rails 50 , 52 are cooperatingly configured and slidably engaged with the laterally extending top and bottom rails 68 , 70 of the header connector 24 , respectively. 17, 18, the protrusions 96, 98 (FIG. 17) on the slider 38 are desirably arranged to engage the cooperatingly constructed and aligned recesses 100 (the bottom recesses are not visible) of the header connector 24 for The single retractable needle 30 is properly positioned within the slot 72 of the hub connector 24 during assembly and use of the blood collection hub 10 . 11, 18, 19, the base connector 24 is provided with a circumferentially extending arcuate ring 64 and a cooperating circular wall 62 so as to be positioned between the base connector 24 and the forward facing edge of the barrel 16 of the body 12. Create a frictional engagement between them. This frictional engagement is desirably sufficient to maintain the hub connector 24 attached to the forward end of the barrel 16 as oppositely directed pressures are applied to the textured contact surfaces 74, 48, as discussed below.

5, 6, 13 further show the relatively flat edges 84, 86 with respect to the opposed arcuate edges 88, 90 of the flange 22, and show the slider 38 and hub connector whenever the needle 30 is in the unretracted and retracted positions respectively. 24 relative positions.

5 and 7-11, the slider 38 of the front attachment of the body 12 and the header connector 24 are provided with textured contact pads 48, 74 respectively to facilitate the application of oppositely directed manual pressure to each contact pad to Create body 12 relative to slide 34, needle hub 28, compression spring 36, retractable single needle 30 side slip. This movement is desirably in a lateral direction, which causes the discharge needle end 34 of the single retractable needle 30 to move laterally through the portion 80 of reduced height of the partial wall 82 ( FIG. 10 ) until the needle 30 is approximately aligned with the needle withdrawal cavity 76 as the compression coil spring 36 expands to the position shown in FIG. The length of the single retractable needle 30 is desirably such that the venipuncture end 32 of the needle 30 is fully contained within the needle support 46 of the slider 38 when in the position shown in FIG. 14 . 12-15 show the blood collection hub 10 of the present invention with the single retractable needle 30 in the fully retracted position.

Other changes and modifications of the invention will be similarly apparent to those of ordinary skill in the art in view of reading this specification accompanied by the drawings, and the scope of the invention disclosed herein is intended to be legally limited only by the inventor and/or applicant be limited by the broadest interpretation ascribed to the scope of the appended applications.

10‧‧‧Blood Collection Tube Holder

12‧‧‧Ontology

16‧‧‧Syringe

20‧‧‧needle retracted chamber

22‧‧‧Rear flange

24‧‧‧Socket Connector

38‧‧‧Sliding parts

40‧‧‧needle cover

Claims (13)

A blood collection hub comprising: a single retractable needle having oppositely directed venipuncture ends and a fluid discharge needle end; and a body including a barrel and a needle withdrawal chamber, the barrel containing the barrel chamber, the The needle withdrawal chamber comprises a needle withdrawal chamber, the barrel and the needle withdrawal chamber being generally parallel and separated by a portion of wall through which the fluid discharge needle end is passable such that the single retractable needle can be withdrawn from the barrel Move laterally into alignment with the needle withdrawal lumen to initiate needle withdrawal. A blood collection hub as claimed in claim 1, wherein the barrel and the front attachment of the barrel are constructed to facilitate the barrel and the needle along a direction transverse to the longitudinal axis passing through the needle axis to do relative slip to initiate needle withdrawal. A blood collection hub comprising: a generally cylindrical body including a barrel and a needle withdrawal lumen; a front attachment; and a single retractable needle including oppositely directed venipuncture and fluid discharge ends; wherein the body and the front attachment are cooperatingly configured to facilitate lateral sliding of the body relative to the retractable single needle prior to needle withdrawal, and Wherein the barrel further comprises a barrel cavity, the barrel cavity and the needle withdrawal cavity being substantially parallel and separated by a partial wall having a portion of reduced height through which the fluid discharge end can pass such that the A single retractable needle is movable laterally from the barrel into alignment with the needle withdrawal lumen to initiate needle withdrawal. The blood collection socket according to claim 3 of the patent application, wherein the body further includes a substantially cylindrical barrel cavity and an integrally formed needle withdrawal cavity, wherein the barrel cavity and the needle withdrawal cavity are approximately parallel and separated by a partial wall . The blood collection tube base of claim 4, wherein the partial wall is constructed to facilitate lateral sliding of the fluid discharge end of the single retractable needle from a first position to a second position, the first position being the The single retractable needle is generally centered within and coaxially aligned with the barrel cavity, and the second position is such that the single retractable needle is generally aligned with the needle withdrawal cavity. The blood collection hub of claim 3, wherein the venipuncture end of the single retractable needle protrudes forward from the front attachment. The blood collection hub of claim 3, wherein the venipuncture end of the single retractable needle is covered by a selectively releasable needle cover before use. The blood collection tube base of claim 3, wherein the front attachment further includes a slider and a tube base connector. The blood collection hub of claim 8, wherein the hub connector engages and partially covers the open front end of the syringe. 9. The blood collection hub of claim 9, wherein the slider slidably engages the hub connector along an axis generally transverse to the longitudinal axis passing through the single retractable needle. A blood collection hub as claimed in claim 8, wherein the slider is configured to position and support a rearwardly biased hub attached in fixed relation to the retractable single needle. The blood collection hub of claim 8, wherein the hub connector further includes a transverse slot for facilitating the single retractable needle when oppositely directed manual pressure is applied to the body and the slider There is relative lateral movement between the first and second positions. The blood collection hub of claim 7, wherein the front attachment further comprises a slide and the selectively releasable needle cover further comprises a locking arm which prevents the slide and the needle withdrawal cavity from becoming prematurely approximately aligned, and thereby avoid initiating needle withdrawal before the blood collection hub is used to draw blood.

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